1/* 2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24import java.awt.Dimension; 25import java.awt.Graphics2D; 26import java.awt.image.BufferedImage; 27import javax.swing.JSlider; 28import javax.swing.SwingUtilities; 29import javax.swing.UIManager; 30import javax.swing.plaf.metal.MetalLookAndFeel; 31 32/* 33 * @test 34 * @bug 8162856 35 * @summary Bad rendering of Swing UI controls with Metal L&F on HiDPI display 36 * @run main MetalHiDPISliderThumbTest 37 */ 38public class MetalHiDPISliderThumbTest { 39 40 public static void main(String[] args) throws Exception { 41 42 SwingUtilities.invokeAndWait(() -> { 43 44 try { 45 UIManager.setLookAndFeel(new MetalLookAndFeel()); 46 } catch (Exception e) { 47 throw new RuntimeException(e); 48 } 49 50 if (!testSliderThumb(true)) { 51 throw new RuntimeException("Horizontal Slider Thumb is not scaled!"); 52 } 53 54 if (!testSliderThumb(false)) { 55 throw new RuntimeException("Vertical Slider Thumb is not scaled!"); 56 } 57 }); 58 } 59 60 private static boolean testSliderThumb(boolean horizontal) { 61 int scale = 3; 62 63 int w = horizontal ? 100 : 20; 64 int h = horizontal ? 20 : 100; 65 66 JSlider testSlider = new JSlider(); 67 testSlider.setSize(w, h); 68 Dimension size = new Dimension(w, h); 69 testSlider.setPreferredSize(size); 70 testSlider.setMinimumSize(size); 71 testSlider.setMaximumSize(size); 72 testSlider.setOrientation(horizontal ? JSlider.HORIZONTAL : JSlider.VERTICAL); 73 74 int sw = scale * w; 75 int sh = scale * h; 76 77 final BufferedImage img = new BufferedImage(sw, sh, BufferedImage.TYPE_INT_RGB); 78 79 Graphics2D g = img.createGraphics(); 80 g.scale(scale, scale); 81 testSlider.paint(g); 82 g.dispose(); 83 84 if (horizontal) { 85 int y = sh / 2; 86 87 int xMin = 0; 88 int rgb = img.getRGB(xMin, y); 89 for (int i = 0; i < sw; i++) { 90 if (img.getRGB(i, y) != rgb) { 91 xMin = i; 92 break; 93 } 94 } 95 96 int xMax = sw - 1; 97 rgb = img.getRGB(xMax, y); 98 for (int i = sw - 1; i > 0; i--) { 99 if (img.getRGB(i, y) != rgb) { 100 xMax = i; 101 break; 102 } 103 } 104 105 int d = 3 * scale; 106 int xc = (xMin + xMax) / 2 - d; 107 rgb = img.getRGB(xc, y); 108 109 for (int x = xMin + d; x < xc; x++) { 110 if (img.getRGB(x, y) != rgb) { 111 return true; 112 } 113 } 114 } else { 115 int x = sw / 2; 116 117 int yMin = 0; 118 int rgb = img.getRGB(x, yMin); 119 for (int i = 0; i < sh; i++) { 120 if (img.getRGB(x, i) != rgb) { 121 yMin = i; 122 break; 123 } 124 } 125 126 int yMax = sh - 1; 127 rgb = img.getRGB(x, yMax); 128 for (int i = sh - 1; i > 0; i--) { 129 if (img.getRGB(x, i) != rgb) { 130 yMax = i; 131 break; 132 } 133 } 134 135 int d = 3 * scale; 136 int yc = (yMin + yMax) / 2 - d; 137 rgb = img.getRGB(x, yc); 138 139 for (int y = yMin + d; y < yc; y++) { 140 if (img.getRGB(x, y) != rgb) { 141 return true; 142 } 143 } 144 } 145 return false; 146 } 147} 148